This is an XML namespace defined in the XForms 1.0 specification. The 19 December 2000 XForms 1.0 specification is the latest version as of $Date: 2000/12/19 19:23:20 $.
Note. This namespace may change without notice. For updated information, please refer to the latest version of the XForms 1.0 specification.
For more information about XML, please refer to The Extensible Markup Language (XML) 1.0 specification. For more information about XML namespaces, please refer to the Namespaces in XML specification.